25949699604 has 72 divisors (see below), whose sum is σ = 67916576000. Its totient is φ = 8345462400.

The previous prime is 25949699527. The next prime is 25949699639. The reversal of 25949699604 is 40699694952.

25949699604 is a `hidden beast` number, since 2 + 59 + 496 + 9 + 96 + 0 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 334272 + ... + 404520.

Almost surely, 2^25949699604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25949699604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33958288000).

25949699604 is an abundant number, since it is smaller than the sum of its proper divisors (41966876396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25949699604 is a wasteful number, since it uses less digits than its factorization.

25949699604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70621 (or 70616 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 63.

The spelling of 25949699604 in words is "twenty-five billion, nine hundred forty-nine million, six hundred ninety-nine thousand, six hundred four".